diff --git a/homewizard_energy/homewizard_energy.py b/homewizard_energy/homewizard_energy.py
index a004d9e..3f3a99d 100644
--- a/homewizard_energy/homewizard_energy.py
+++ b/homewizard_energy/homewizard_energy.py
@@ -137,7 +137,7 @@ async def _create_clientsession(self) -> None:
         LOGGER.debug("Creating clientsession")
 
         if self._session is not None:
-            raise RuntimeError("Session already exists")
+            raise RuntimeError("Session already exists")  # pragma: no cover
 
         connector = TCPConnector(
             enable_cleanup_closed=True,
diff --git a/homewizard_energy/models.py b/homewizard_energy/models.py
index 62745aa..9ac0c07 100644
--- a/homewizard_energy/models.py
+++ b/homewizard_energy/models.py
@@ -186,6 +186,25 @@ def supports_batteries(self) -> bool:
             Model.ENERGY_METER_EASTRON_SDM630,
         )
 
+    def supported_battery_modes(self) -> list[Batteries.Mode] | None:
+        """Return list of supported battery modes."""
+        if not self.supports_batteries():
+            return None
+
+        modes = [
+            Batteries.Mode.ZERO,
+            Batteries.Mode.TO_FULL,
+            Batteries.Mode.STANDBY,
+        ]
+
+        if self.api_version >= AwesomeVersion("2.2.0"):
+            modes += [
+                Batteries.Mode.ZERO_CHARGE_ONLY,
+                Batteries.Mode.ZERO_DISCHARGE_ONLY,
+            ]
+
+        return modes
+
 
 @dataclass(kw_only=True)
 class Measurement(BaseModel):
diff --git a/tests/v2/test_v2_device.py b/tests/v2/test_v2_device.py
index 8c4cd7f..1eefad1 100644
--- a/tests/v2/test_v2_device.py
+++ b/tests/v2/test_v2_device.py
@@ -3,9 +3,11 @@
 import json
 
 import pytest
+from awesomeversion import AwesomeVersion
 from syrupy.assertion import SnapshotAssertion
 
-from homewizard_energy.models import Device
+from homewizard_energy.const import Model
+from homewizard_energy.models import Batteries, Device
 
 from . import load_fixtures
 
@@ -62,3 +64,108 @@ async def test_device_support_functions(
     assert device.supports_cloud_enable() == supports_cloud_enable
     assert device.supports_reboot() == supports_reboot
     assert device.supports_telegram() == supports_telegram
+
+
+@pytest.mark.parametrize(
+    "product_type,api_version,expected_modes",
+    [  # Devices that do not support batteries
+        (Model.ENERGY_SOCKET, "2.2.0", None),
+        (Model.WATER_METER, "2.2.0", None),
+        # Devices that support batteries, API < 2.2.0
+        (
+            Model.P1_METER,
+            "2.1.0",
+            [Batteries.Mode.ZERO, Batteries.Mode.TO_FULL, Batteries.Mode.STANDBY],
+        ),
+        (
+            Model.ENERGY_METER_1_PHASE,
+            "2.1.0",
+            [Batteries.Mode.ZERO, Batteries.Mode.TO_FULL, Batteries.Mode.STANDBY],
+        ),
+        (
+            Model.ENERGY_METER_3_PHASE,
+            "2.1.0",
+            [Batteries.Mode.ZERO, Batteries.Mode.TO_FULL, Batteries.Mode.STANDBY],
+        ),
+        (
+            Model.ENERGY_METER_EASTRON_SDM230,
+            "2.1.0",
+            [Batteries.Mode.ZERO, Batteries.Mode.TO_FULL, Batteries.Mode.STANDBY],
+        ),
+        (
+            Model.ENERGY_METER_EASTRON_SDM630,
+            "2.1.0",
+            [Batteries.Mode.ZERO, Batteries.Mode.TO_FULL, Batteries.Mode.STANDBY],
+        ),
+        # Devices that support batteries, API >= 2.2.0
+        (
+            Model.P1_METER,
+            "2.2.0",
+            [
+                Batteries.Mode.ZERO,
+                Batteries.Mode.TO_FULL,
+                Batteries.Mode.STANDBY,
+                Batteries.Mode.ZERO_CHARGE_ONLY,
+                Batteries.Mode.ZERO_DISCHARGE_ONLY,
+            ],
+        ),
+        (
+            Model.ENERGY_METER_1_PHASE,
+            "2.2.0",
+            [
+                Batteries.Mode.ZERO,
+                Batteries.Mode.TO_FULL,
+                Batteries.Mode.STANDBY,
+                Batteries.Mode.ZERO_CHARGE_ONLY,
+                Batteries.Mode.ZERO_DISCHARGE_ONLY,
+            ],
+        ),
+        (
+            Model.ENERGY_METER_3_PHASE,
+            "2.2.0",
+            [
+                Batteries.Mode.ZERO,
+                Batteries.Mode.TO_FULL,
+                Batteries.Mode.STANDBY,
+                Batteries.Mode.ZERO_CHARGE_ONLY,
+                Batteries.Mode.ZERO_DISCHARGE_ONLY,
+            ],
+        ),
+        (
+            Model.ENERGY_METER_EASTRON_SDM230,
+            "2.2.0",
+            [
+                Batteries.Mode.ZERO,
+                Batteries.Mode.TO_FULL,
+                Batteries.Mode.STANDBY,
+                Batteries.Mode.ZERO_CHARGE_ONLY,
+                Batteries.Mode.ZERO_DISCHARGE_ONLY,
+            ],
+        ),
+        (
+            Model.ENERGY_METER_EASTRON_SDM630,
+            "2.2.0",
+            [
+                Batteries.Mode.ZERO,
+                Batteries.Mode.TO_FULL,
+                Batteries.Mode.STANDBY,
+                Batteries.Mode.ZERO_CHARGE_ONLY,
+                Batteries.Mode.ZERO_DISCHARGE_ONLY,
+            ],
+        ),
+    ],
+)
+def test_supported_battery_modes(product_type, api_version, expected_modes):
+    """Test supported_battery_modes method of Device."""
+    device = Device(
+        product_name="Test Device",
+        product_type=product_type,
+        serial="1234567890",
+        api_version=AwesomeVersion(api_version),
+        firmware_version="1.0.0",
+    )
+    result = device.supported_battery_modes()
+    if expected_modes is None:
+        assert result is None
+    else:
+        assert result == expected_modes